<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /* 
          无论是float还是display:inline-block的方式
          都会让网页的所有元素按照从左到右，逐行排列
        
         */
        .box1,.box2{
            width: 200px;
            height: 200px;
        }

        .box1{
            background-color:darkseagreen;
            display: inline-block;
        }
        .box2{
            background-color: dodgerblue;
            display: inline-block;
        }
    </style>
</head>
<body>
      <div class="box1"></div>
      <div class="box2"></div>
</body>
</html>